The main issue with all the threads about this is that most people commenting have no experience of a truly dysfunctional,toxic relationship.
We tend to look for a villain, we tend to try to (if not actually) sympathise with the victim. Rationalise it, find a reason why and ultimately still come to the same basic victim/villain scenario.
The trouble is, in toxic relationships both partners are usually both at one time or another. Controlling, abusive, goady, sneery, demeaning. Controlled, abused, demeaned,afraid,hurt.All the while telling themselves that they're passionate and love makes them do crazy things.
There's no just victim here. There's no just abuser. The insistence to see everything black and white,label them either victim or abuser, it's all based on a false premise and not the reality of a toxic relationship.
Do I believe he abused her? Yes. There is no doubt in my mind.
Do I believe she abused him? Yes. There is no doubt in my mind.
Do I believe they have also been victims? Also yes. That is the part I can very easily sympathise with. Two very damaged people ,with addiction and mental health issues came together and absolutely imploded to a horrifying level just adding to their own trauma and issues. Apart,they might ok or even nice people, together they ruined each other in more ways than one. I can feel sorry for them because of that, while still acknowledging they have been abusive and the other.
There's no clear goodie or baddy in this shitshow of a relationship and I think a lot of people struggle with that.